Sökning: "Acetylene"

Visar resultat 1 - 5 av 10 uppsatser innehållade ordet Acetylene.

  1. 1. Nitrogen fixation by cyanobacteria associated to feathermosses : a comparison between Scots pine and Norway spruce stands

    Master-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Felicia Dahlgren Lidman; [2018]
    Nyckelord :boreal forest; pinus sylvestris; picea abies; acetylene reduction assay;

    Sammanfattning : The limitations of available nutrients are strong in the boreal forest, especially of nitrogen (N). Due to slow mineralization rate of organic soil nitrogen, caused by low temperatures and acidic soils. Few organisms can fixate atmospheric nitrogen. Among those who have the ability there are some that are common in the boreal forest. LÄS MER

  3. 2. Graphene Growth through Chemical Vapor Deposition - Optimization of Growth and Transfer Parameters

    Master-uppsats, Umeå universitet/Institutionen för fysik

    Författare :Adam Olsson; [2017]
    Nyckelord :Graphene; Chemical Vapor Deposition; CVD; Acetylene; Copper; Graphene transfer;

    Sammanfattning : The goal of this thesis work is to investigate the possibility to grow graphene by Chemical Vapor Deposition (CVD) on copper foil with acetylene as a precursor and varigon (5\% H$_2$ in Ar) as a carrier gas. The possibility of nitrogen doping by ammonia treatment during the growth process is also investigated. LÄS MER

  4. 3. Towards Nickel Boride Catalyzed C-C Coupling Reactions

    Master-uppsats, KTH/Skolan för kemivetenskap (CHE)

    Författare :Ágnes Lakó; [2017]
    Nyckelord :heterogeneous catalysis; nickel catalysis; coupling reactions; cross-coupling; homocoupling;

    Sammanfattning : This thesis focuses on the study of nickel boride as a catalyst in various coupling reactions. The nickel boride catalyst was investigated in three different coupling reactions, the experiments aimed at understanding the activity and catalytic properties of nickel boride. LÄS MER

  5. 4. The Influence of different experimental parameters on Pd based chemical vapor deposition growncarbon nanostructures

    Master-uppsats, Institutionen för fysik

    Författare :asghar ali khan; [2013]
    Nyckelord :;

    Sammanfattning : Carbon nanostructures were fabricated by catalytic decomposition of acetylene ondifferently shaped palladium (Pd) nanocatalysts (nanoplates (triangle/hexagonal) andnanocubes) synthesized by an aqueous solution technique. The fabricated carbonnanostructures were investigated by transmission electron microscopy (TEM), itconsists of multi-walled carbon nanotubes (MWCNTs) together with significant numberof helical carbon nanofibers (HCNFs) and straight carbon nanofibers (SCNFs). LÄS MER

  7. 5. Nitrogen fixation among boreal feather mosses along a clear-cut chronosequence

    Master-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Lisa Wik Persson; [2013]
    Nyckelord :boreal forest; nitrogen fixation; feather moss; Pleurozium schreberi; Hylocomium splendens; cyanobacteria; acetylene reduction; Sweden; boreal skog; kvävefixering; cyanobakterier; acetylen reduktion; Sverige;

    Sammanfattning : The Swedish boreal forests are limited by nitrogen (N) availability. While biological N2 fixation by cyanobacteria hosted by pleurocarpous feather mosses are important sources of N input to natural boreal forest ecosystems, little is known about the patterns of N2 fixation in silvicultural systems. LÄS MER